CN102811827B - For the conveying device of conveying isolation long size work - Google Patents

Abstract

A kind of conveying device of long size work (10), this conveying device is transverse to its longitudinal direction, this conveying device comprises: the cingulum (1) of Continuous Drive, this cingulum (1) travels over flex point (4), and this cingulum (1) has groove (7, 7 '), each groove holds a workpiece (10), and this conveying device comprises feed point, when groove (7 ') introduced by workpiece (10) at this feed point place, by its outer surface, projection has crossed groove (7 ') to this workpiece, and be resisted against on guide rail (3) in a sliding manner, guide rail (3) and cingulum (1) carry out coordinating and advance between two flex points (4), and this guide rail has towards the outstanding profile of cingulum (1), each groove (7) is formed with cross section between the two mould teeth (6) from cingulum (1) projection, the two sides (8 of the mould tooth (6) of groove (7) are combined to make the workpiece of insertion (10) only be resisted against, 9).Rotate the cingulum (1) thus expanding groove (7 ') to be combined with feed point at flex point (4) place, so that workpiece (10) is axially pushed in the middle of the groove (7 ') expanded by the longitudinal side (13) from cingulum (1), and be not resisted against the side (8,9) of the mould tooth (6) combining groove (7 ').

Description

Conveying device for conveying isolated long workpieces

technical field

The invention relates to a conveying device for conveying isolated elongated workpieces, such as wires, transversely to its longitudinal direction. The conveying device has a continuously driven toothed belt which travels over at least two inflection points and which has grooves on its exterior facing the workpieces, each groove receiving a workpiece, and the conveying device having a feed point, in each case, when the workpiece is introduced into the groove at this feed point, the workpiece projects radially beyond said groove by its outer surface area and rests in a sliding manner on the guide rail , the guide rail is coordinated with the toothed belt and runs at a distance from said belt and in the region between two inflection points, and the guide rail has a curved profile in the toothed belt towards the groove.

Background technique

Such conveying devices are used, for example, to convey nail blanks in nail production machines.

From the EP0407656B1 patent, it is known that a conveying device for conveying long workpieces such as metal wires used in wire processing is slightly pressed, which travels through two reversely driven toothed belts, wherein the conveyed workpieces are accommodated in the toothed belts facing each other. between the sides. The workpieces must be accommodated in their respective grooves by the interaction of the toothed belt, with each workpiece being located in the groove between two lobes. This means that in each case the straight travel of the two-toothed belts is directed over a specific guide rod, since the application of pressure required to securely accommodate the workpiece in its respective groove must be achieved by the interaction of the two-toothed belts. produce. The structure of this known conveying device is relatively complex and the changeover for conveying workpieces of different thicknesses takes time. Furthermore, the transport of reverse drive belts requires spur gear units which occupy most of the effective volume of the step gears used and must therefore be dimensioned accordingly.

Patent DE 3143269 A1 describes a workpiece conveying system in which a toothed belt with protruding teeth on the outside opposite the drive side is used for workpiece conveying. Grooves for accommodating conveyed workpieces are formed between every two teeth. At the free end of said tooth, said tooth has, at least on the side incorporating the groove, a protrusion directed towards the adjacent tooth so as to at least partially overlap the received workpiece on the outside of the groove. This prevents the workpieces from falling out of the groove in the straight run of the conveying direction of the known conveying system, since the outside of the groove opening is overlapped by a protrusion connected to an end of at least one of the side teeth. However, if the belt travels over the eccentric roll and the conveying path along the eccentric is curved with the center of curvature on the side of the belt opposite the groove, the teeth at the front of the belt are no longer parallel to each other. On the contrary, the groove formed between the teeth expands so that the groove widens outwards from the toothed belt, whereby the part between the two teeth becomes larger and becomes the space of the groove, which is then automatically opened so that the workpiece can be inserted The groove is substantially radial to or removed from the eccentric roll. On the other eccentric, for example on the opposite side of the conveying path, for example at the bottom of the eccentric, the expansion of the grooves that occur when the teeth expand during rotation can be used to move the individual workpieces from substantially radial to the eccentric The expansion groove falls out. However, in this known conveying system, the mold recesses between every two teeth are only adapted to a certain diameter of the workpieces to be accommodated, while other workpieces with different diameters can be conveyed only within a very small range of diameters. Other workpieces with very large diameters cannot be accommodated, as these would still fall out of the groove, and the same fact occurs for workpieces with smaller diameters, even though they can be opened from the only part of the groove that is closed Protrude outward. Therefore, if workpieces with very different diameters are conveyed using this known conveying system, the entire toothed belt must also be replaced when changing workpieces, so that workpieces with considerably varying diameters are conveyed safely from the conveying point of view.

Patent DE19846714C1 describes a device for conveying long workpieces from a feeding station to a processing station by means of at least one conveying toothed belt. Provided on the outside of the toothed belt are inserted semicircular grooves for conveying workpieces. The feeding station and the processing station are respectively provided on the deflection wheels of the toothed belt, wherein the two semicircular grooves accommodating workpieces are both flanged to the side of the deflection wheels at the feed station. The toothed belt and said grooves on the insert wheel are adapted to the diameter of the workpiece being conveyed. However, the outer diameter of the insert pulley protrudes beyond the area of the toothed belt that deviates from the drive pulley. Below, parallel to the common axis of the planet wheel and the insert wheel, the workpieces are introduced in isolation by means of a feed device. The toothed belt is coordinated with a fixed guide rail at a distance from the toothed belt and has a horizontal sliding surface and a front end, the sliding surface of which is cylindrical and located behind the coaxial housing of the toothed belt driving wheel and the two insert wheels. Workpieces fed to the lowest groove of the insertion wheel are pushed into the sliding surface of the end of the guide rail in the longitudinal direction of the feed wheel and are clamped there between the groove and the end of the guide rail. As the eccentric roller progresses step by step, the workpiece slides through its outer portion on the end of the guide rail until it reaches a point at which, in each case, the two grooves of the two insert wheels temporarily contact the toothed belt simultaneously driven by the driving wheel groove. There, the workpieces accommodated in the grooves of the insertion wheels are collected by the grooves of the toothed belt and then conveyed further against the slide rails in the straight section of the conveying path until another point of inflection. Also in this known conveying device for the conveyance of workpieces with a radius received in grooves formed on the toothed belt with a semicircular cross-section, except for the grooves, only in the case of smaller radii Difficulty, because these workpieces can rotate sideways inside the groove, which is not desired. However, if the workpiece to be conveyed has a large diameter, the problem arises that the support inside the relatively small groove no longer meets the situation of the larger diameter and thus an undisturbed conveyance along the conveying path. In addition, the distance between the rail and the toothed belt must remain the same over the length of the straight conveying path, so that individual workpieces do not easily leave the grooves, and also to keep the frictional force of the workpiece sliding against the rail constant and low. It is also laborious to feed the workpiece into the groove.

Patent DE19846716C2 also shows a similar delivery device. Here, however, unlike the previously described conveyors, the stretching travel of the toothed belt between the two deflection stations is coordinated with the rail, which is no longer straight but cylindrically curved towards the groove, which entails The advantage is that the jaws of the workpiece are significantly flattened and low friction is achieved during workpiece transport. On the other hand, however, if workpieces with a larger or smaller diameter are conveyed, the same problem arises here again.

Contents of the invention

Based on this, the object of the present invention is to provide a conveying device of the originally specified type, in which workpieces can be fed into the grooves of the toothed belt in a particularly simple and uncomplicated manner, and the toothed belt can convey workpieces with a large diameter range . Furthermore, the cost of establishing the new delivery device is low.

The invention is realized in the case of conveyors of the type originally specified, that is, each groove is formed with a cross-section between two die teeth protruding from the toothed belt, so that the workpiece inserted in the groove rests only on the Both sides of the die teeth incorporating grooves, and a toothed belt rotating at an inflection point with the expansion of the grooves between the die teeth is coordinated with the feed point to facilitate the In this case, the workpiece is pushed axially from the longitudinal sides of the toothed belt into the expanded grooves without abutting against the sides of the mold teeth incorporating the grooves.

In the present invention, each groove is formed as a concave intermediate space between two mold teeth protruding from the toothed belt, whereby a state is realized that when the toothed belt rotates around the inflection point (generally in the form of a deflection wheel), The toothed belt bends due to the conveying direction, it is arched there, and in the curved section the mold teeth located in front of it no longer run parallel to each other, but are separated from each other by an acute angle. The grooves formed between the mold teeth thus also widen outwards from the toothed belt, and the distance between the two sides which in each case incorporate one groove transversely also increases uniformly. However, if the toothed belt has now left the bend around the point of inflection, the expansion of the mold teeth is reversed, which is why every groove between two mold teeth also returns to its original normal size again.

The characteristic of the combination with the configuration of the feed point of the workpiece on the groove of the toothed belt is now used in the object mode of the invention: the feed point is coordinated with the inflection point so that the groove can be used there in front of the rotating toothed belt. Expansion between teeth. That is, when the mold teeth are opened and thus the groove becomes larger, in each case a workpiece is introduced there in this way into the expanded groove, and not substantially radially to the deflection (deflection), but The workpiece is pushed axially from one of the two longitudinal sides of the toothed belt into the expanded groove, where it also abuts against the guide rail used according to the invention for conveying the workpiece. The expansion of the groove may cause the workpiece to be pushed laterally into the groove so that it only comes into contact with the guide rail during insertion, and not with the sides of the two-sided mold teeth at least during the introduction process. The workpiece can thus be pushed into the groove simply by overcoming the friction between it and the guide rail, thus with only a very low resistance, which is very favorable with respect to insertion speed and insertion force. As workpieces are inserted, the pulley is driven forward at every other interval so that the feeder can insert additional workpieces into the next groove. During this advance, if the feed device is exactly at the point of inflection, it may result that the widened groove has already narrowed again and during this narrowing the workpiece may already be abutting against the sides of the die tooth.

Due to a further feature of the invention, that each groove is formed with a cross-section so that in the non-expanded state, the inserted workpiece rests only on the sides of the die teeth (and not indicated at the bottom of the groove), the insertion at The fast lateral gripping of the workpiece of the groove is also achieved by the flanks of the two tool teeth incorporating the groove, since they expand back particularly quickly and precisely in their part protruding from the toothed belt.

During the conveying of the workpieces in the grooves in the region between the two inflection points of the toothed belt, since the workpieces bear against the guide rails located there, these workpieces are also guided in the same way in the region of their outer surface protruding from the grooves, and also accommodated in the groove. Due to the use of guide rails which are curved towards the toothed belt and which preferably have a cylindrical curvature in their direction, in a toothed belt stretched on a curved rail, for this all approximately equal tensions are generated, whereby the conveyed workpieces are also pressed against by equal pressure On the guideway, this creates approximately the same frictional force for all workpieces.

The delivery device according to the invention also presents a particularly cost-effective solution, which can be maintained more significantly and is handled more easily than known solutions. Because, in the present invention, when the workpiece is inserted into the expanded groove, the toothed belt does not come into contact with the workpiece during this insertion, because the toothed belt can be introduced against the guide rail alone, and there is no toothed belt on the belt due to the insertion process. wear and tear. Since the insertion of the workpiece into the groove (unlike the dropping of the workpiece into the conveyor or into the groove) is a mechanically controlled process, in the present invention the groove can be filled with workpieces particularly quickly at the feed point, wherein the insertion The mechanical design of the process itself is also particularly simple. The delivery device according to the invention can therefore also be operated particularly efficiently.

In the conveyor device according to the invention it is possible to safely operate the toothed belt with workpieces of a relatively large diameter range: since the design of the grooves is not adapted to very specific diameter dimensions, with well-known grooves adapted to workpieces of a specific size Compared with the delivery device of the diameter, a significant improvement has been obtained in this respect. The use of a guide rail as a support element also creates the possibility of handling for the outer surface area of the conveying workpiece protruding outwards, wherein the protrusion is relatively large because it cannot fall out of the groove due to the support of the guide rail.

The cross-section of the recess for accommodating workpieces supported only on two sides during transport can be selected in any suitable form in the transport device according to the invention. The cross-section of the grooves in their non-expanded state (and viewed in a plane perpendicular to the outer plane of rotation of the toothed belt) is especially preferably formed V-shaped or trapezoidal. The cross-section of the groove formed in this way is especially best adapted to the delivery device of the invention.

In the conveying device according to the invention, the distance between the guide rail and the partially toothed belt coordinated therewith is also advantageously designed to be adjustable in order to be able to take into account the suitability for particularly fast conveying of other workpiece diameters.

A further preferred embodiment of the invention is also that one or both inflection points of the conveying device are respectively formed by deflection wheels.

Furthermore, it is particularly recommended if, in the conveyor device according to the invention, the die teeth are formed from a viscoplastic material in order to ensure that the workpieces in the recesses are received securely.

The guide rails of the conveyor device according to the invention can be designed from any material which is suitable for the particular application presented here. However, if metallic workpieces are conveyed with the conveying device according to the invention, it is particularly recommended to also use guide rails made of metal.

A further preferred embodiment of the invention is also that, in the non-expanded delivery state of the grooves, workpieces inserted into the grooves are frictionally accommodated into their respective grooves.

Description of drawings

The principles of the present invention will be explained in more detail below through the embodiments and the accompanying drawings. In the schema:

Figure 1 is a side view of part of a delivery device according to the present invention;

Figure 2 is an enlarged portion of Figure 1 showing the inflection point of the toothed belt coordinating with the feed point of the workpiece, and

Figure 3 is a perspective view showing part of the conveyor device of the invention shown in Figure 2, however here showing only one workpiece inserted at the feed point after cutting the feed strand.

detailed description

Figure 1 basically shows in great detail a part of a conveying device for elongated workpieces such as nail blanks, tubes, bolts, pins or the like, wherein the device has a continuous toothed belt 1 and a relatively long track running almost straight 2. Carry out the conveying function along the track.

Coordinated with this track 2 in the direction of the toothed belt 1 (curve radius R) is the guide rail 3 which runs over its extension and bends, albeit only at a small angle.

The toothed belt 1 is guided around the deflection wheel 4 on the left-hand side in FIG. 1 , the only defined curvature of the toothed belt 1 around the deflection wheel 4 being shown in the schematic diagram of FIG. 1 , for intermittently driving its components.

On this side, the end region 5 extends the guide rail 3 somewhat beyond the position of the deflection wheel 4 .

Referring now to FIG. 2 , an enlarged portion of FIG. 1 , ie the area around the deflection wheel 4 is shown.

The arrows in the figure represent the conveying direction of the toothed belt 1 and also represent the rotation direction of the deflection wheel 4 .

The toothed belt 1 is provided with die teeth 6 on its outside facing away from the deflection wheel 4, wherein every two die teeth 6 between the toothed belt 1 form a groove 7, which is connected with the side faces 8 and 8 of two adjacent die teeth 6 and 9 back and forth

(Please refer to Figure 2).

In the embodiment shown in the figures, the groove 7 has a trapezoidal cross-section (viewed in its longitudinal center plane aligned perpendicularly to the toothed belt 1 ). However, instead of a trapezoid, any other suitable shape, such as a triangular cross-section, may also be used.

2 and 3 also show, when rotating about the eccentric roll 4, the mold teeth 6 are separated from each other, wherein the angle α ₁ formed between the sides 8 and 9 in the non-expanded state increases to α in the expanded state. Angle α ₂ . Thus, in the example shown, the angle _α1 is 56°, while the (open) angle _α2 corresponds to the value 75°.

Shortly before the end of the rotation of the toothed belt 1 around the yaw bar 4 , whereby (viewed in the direction of travel A of the toothed belt 1 ) the groove 7 is still widened, the workpiece 10 is inserted at an angle of 90° to the longitudinal direction of the toothed belt 1 In each still expanded groove, as shown in Figures 2 and 3, the groove 7' has again approached the guide rail 3, so that the workpiece 10 does not come into contact with the sides 8, 9 of the mold tooth 6 incorporating this groove 7' .

The grooves 7' (the same applies to all grooves 7) are designed in such a way that even when the toothed belt 1 continues to run and the grooves 7 no longer expand and expand, in each case the As far as the rest of the outer surface area of the belt protrudes outwards, i.e. in the direction of the guide rail 3, and during the travel of the toothed belt 1 sliding over the guide rail 3 at the protruding end, the inserted workpiece 10 rests only against said recess. The two sides 8 and 9 of the groove 7,. This is shown in FIG. 2 by the workpieces 10 already accommodated in the two grooves 7 , where the grooves 7 are located before the grooves 7 ′ in the conveying direction A of the toothed belt 1 , where each workpiece is now securely accommodated, sideways There is no travel between 8 and 9.

Said workpiece 10 is pushed into the respective groove 7' from one of its two longitudinal sides 13 in its axial direction perpendicular to the conveying direction of the toothed belt 1, as best seen in FIG. 3 .

A continuous strand of wire such as a thread (not shown) is first introduced in direction B (please refer to FIG. 3 ) and is pushed through the groove 7' until a certain amount of the strand is re-emerged from the groove 7'. Appears on the opposite side of the toothed belt 1. Due to the position of the strand of wire introduced during this operation, the strand of wire can be pushed into the groove 7' (viewed in conveying direction A) so that it does not collide with the die teeth 6 incorporating the groove 7'. The two sides 8 and 9 are in contact. It is also possible to insert such that the strand of wire also does not come into contact with the top of the guide rail 3 during insertion. However, it is also possible to insert such that the strand of wire is in contact with the top of the guide rail 3 .

When the strand of wire has been pushed through its distal end, the workpiece 10 cuts the strand of wire at the feed end by two cutting knives 11 operating in opposite directions, so designed so that they are also cut on the workpiece 10 during cutting. A knife tip 12 is formed on it.

FIG. 3 shows the state directly after the workpiece 10 has been severed. The toothed belt 1 does not travel until the cutting process is finished.

After carrying out the cutting process, the toothed belt 1 is conveyed further in the conveying direction A by intermittently driven pulses. It can be seen from Fig. 2 that during insertion the groove 7' which had been previously expanded is closed, ie the groove 7' returns to its non-expanded state, wherein the angle α ₂ assumed in the expanded state returns to the angle α ₁ .

During the narrowing of the groove 7 ′ to its non-expanded state, the previously inserted workpiece 10 is accommodated transversely on the sides 8 and 9 of the two die teeth 6 incorporating said groove 7 , so that it rests against the two sides 8 and 9, but not against the rest of the groove 7. Since the workpiece 10 is already on the sliding surface of the guide rail 3 when it is pushed forward in the conveying direction A, the groove 7' then returns to its no longer expanded state, the workpiece 10 is now supported by the two sides 8 and 9 and the guide rail 3 .

In this way, the workpiece 10 is introduced over the conveying device along the track 2 of the guide rail 3 as far as the other inflection point (not shown) of the toothed belt 1, during which the die teeth 6 are opened in the deflection area and thus the grooves 7 are again Expansion, which enables it to remove the introduced workpiece 10 again from the groove 7 in a suitable manner such as allowing it to fall out.

1 to 3 show a conveying path in which the toothed belt 1 travels substantially horizontally. However, it is obvious that different arrangements of the toothed belt 1 can also be used, for example the way of vertical transmission upwards from the deflection rollers 4; other ways can also be used.

In the embodiment shown in the drawings, the workpieces 10 to be conveyed are metal nails (please refer to FIG. 3 ). In this case, the guide rail 3 also consists of metal. If the sliding surface of the guide rail 3 is specially machined, so that in particular a very low surface roughness can be ensured by suitable machining, the friction forces generated between the guide rail 3 and the nails 10 during transport can be kept extremely low.

However, in the case of other workpieces such as elongated plastic workpieces, the present guide rail 3 can advantageously also be formed from a suitable plastic which produces the lowest possible frictional forces.

Since the guide rail 3 preferably has a cylindrical curvature in the direction of the toothed belt 1 and indeed over its entire length between the points of inflection, a very uniform tension can be produced in the toothed belt 1 along its track 2, which also ensures Uniform force that presses the workpiece 10 accommodated against the groove 7 of the sliding surface of the guide rail 3 . This is particularly advantageous with respect to low friction and wear along the guide rail 3 .

It is recommended that the die teeth 6 consist of an elastic material, preferably preferably a viscoplastic material.

Because, when the workpiece 10 is inserted laterally into the groove 7 at the feed point during the insertion process, there is no contact between the workpiece 10 and the two die teeth 6 incorporating said groove 7', but as the two die teeth The angle between the sides 8 and 9 of 6 becomes smaller, the workpiece 10 is accommodated only during the subsequent conveyance of the toothed belt 1, and during the insertion of the workpiece 10 there is no friction with the two mold teeth 6 anyway, so also No wear, which also represents a clear advantage compared to other solutions.

Depending on the design of the groove 7 and the diameter of the receiving workpiece 10, when the groove 7 is not expanding, this can actually be frictionally accommodated by frictional forces at the two points of contact with the sides 8 and 9 bound to the respective accommodated groove 7's interior.

Claims (8)

1. the conveying device for conveying isolation long size work (10), this conveying device is transverse to its longitudinal direction, this conveying device has: the cingulum (1) of Continuous Drive, this cingulum (1) travels at least two flex points (4), and this cingulum (1) has groove to hold described workpiece (10) in its outside, each groove holds a workpiece (10), and this conveying device has feed point, in each case, it is that 90 ° of angles axially introduce groove that workpiece (10) is sentenced with the longitudinal direction of this cingulum (1) in this feed point, by its exterior surface area, radial projection has crossed described groove to each workpiece (10) received in groove, and this cingulum (1) deviates from described flex point (4) provides mould tooth (6), wherein form a groove between every two continuous print mould teeth (6), the two sides (8 of this groove and adjacent molds tooth (6), 9) combine before and after, two sides (8 described in unexpanded mode, 9) shape (α at angle between ₁), make the workpiece (10) received in a groove not in the bottom of this groove, when this cingulum (1) rotates around described flex point (4), described mould tooth (6) is separated from each other, make this angle (α formed between described two sides (8,9) in this unexpanded mode ₁) be increased to an angle (α in expansion state ₂), wherein, one guide rail (3) is provided, this guide rail (3) is advancing apart from the region between described cingulum (1) segment distance place and this two flex point (4), and this guide rail (3) has towards the bending profile of described groove in this cingulum (1), this guide rail (3) extends beyond the position of the described flex point (4) coordinated with this feed point, and to be contained in described groove and the exterior surface area that radial projection crosses the described workpiece of described groove is resisted against on this guide rail (3) in a sliding manner, and in this feed point place, in each case, during inserting, workpiece (10) from two of cingulum vertical sideways one of them be laterally pushed in the middle of the groove of the expansion when this cingulum (1) rotates around the flex point coordinated, now this workpiece (10) only contacts with this guide rail (3), and do not contact the two sides (8 of the two mould teeth (6) combining groove, 9).

2. conveying device as claimed in claim 1, it is characterized in that, when groove is not expanded, its cross section is formed as V-arrangement or trapezoidal.

3. conveying device as claimed in claim 1 or 2, is characterized in that, guide rail (3) and and its distance of carrying out between the part cingulum (1) coordinated be adjustable.

4. conveying device as claimed in claim 1, is characterized in that, in each case, one or two flex point (4) is by partially taking turns formation.

5. conveying device as claimed in claim 1, it is characterized in that, mould tooth (6) is made up of viscoelastic material.

6. conveying device as claimed in claim 1, is characterized in that, when the material of workpiece (10) is metal, during carrying, use the guide rail (3) be made up of metal.

7. conveying device as claimed in claim 1, is characterized in that, the workpiece (10) inserting groove is frictionally held in the on-expansible feed status of groove is bonded to its respective groove.

8. conveying device as claimed in claim 1, it is characterized in that, mould tooth (6) is attached at cingulum (1), and relative to each other departs from 5.5mm or its integer multiple.